reconditioning services - trinity...
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Rainbow Mechanical and Electrical Works
© Copyright 2013 Trinity Holdings. All Rights Reserved
Reconditioning Services
Mud Motor Rotors and Down hole tools
Rainbow Mechanical and Electrical Works
© Copyright 2013 Trinity Holdings. All Rights Reserved
Part of Trinity Holdings, UAE.
Established in 1991, Abu Dhabi ,to offer specialized services to Oil &
Gas industry Worldwide
Specializes in Thermal spray and surface treatment services
Houses modern spray technology including HVOF, Plasma and Twin
wire arc processes
Supporting facilities include CNC machinery, Heat Treatment furnaces,
re-chroming provisions and laboratory
Rainbow Mechanical and Electrical Works
© Copyright 2013 Trinity Holdings. All Rights Reserved
Mud Motors rotors reconditioning works
HVOF, tungsten carbide coating on rotor surface
Hard chrome plating on rotor surface
Joining of two rotors
Stub welding
Catcher repair
Shortening and re-threading
Mud Motor Rotors
© Copyright 2013 Trinity Holdings. All Rights Reserved
HVOF tungsten carbide coating on Rotors
• Incoming inspection
• Stripping of existing coating
• Pre-polishing
• MPI (Magnetic particle Inspection)
• Grit Blasting
• HVOF spray
• Polishing
• Final Inspection and DPT
• Sealing
• Package/ handling and QC
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Surface damage due to salt incursions Pittings due to corrosion
Incoming inspection – Typical damages
Damages due to acid attack Deep pitting
HVOF carbide coating on mud motor rotors
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Stripping of existing coating
Stripping Tank
Stripping in progress
HVOF carbide coating on mud motor rotors
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Pre-polishing
Pre-polishing
HVOF carbide coating on mud motor rotors
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Magnetic Particle Inspection (MPI)
Checking for surface defects
HVOF carbide coating on mud motor rotors
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Grit Blasting
Blasting to prepare the surface for coating
Blasting room
HVOF carbide coating on mud motor rotors
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HVOF coating
HVOF Tungsten carbide coating on the surface of
the rotor
HVOF carbide coating on mud motor rotors
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Finish Polishing
Final Polishing
HVOF carbide coating on mud motor rotors
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DPT/ Final Inspection
Final Inspection and all dimension checks
Dye Penetrant test to check for coating defects
HVOF carbide coating on mud motor rotors
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Ultrasonic test (If required)
UT test is carried upon customer request to check
for bond integrity
HVOF carbide coating on mud motor rotors
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Sealing
Baking furnace for sealant
Indigenous Rainbow sealant is applied to seal
the micro-porosity
HVOF carbide coating on mud motor rotors
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Packing/ Delivery
Handling and transport
Protection packing
HVOF carbide coating on mud motor rotors
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QC Package
All major and minor dia pre-sizes and final sizes
Coating material spec and its conformity
NDT reports if required
COC
Major dia
6.3446.3466.3486.3506.3526.3546.3566.3586.3606.3626.364
1 2 3 4 5 6 7 8
Observation Maximum Minimum
4.9344.9364.9384.9404.9424.9444.9464.9484.9504.952
1 2 3 4 5 6 7 8
Observation Maximum Minimum
6.2856.2906.2956.3006.305
1 2 3 4 5 6 7 8
Observation
Maximum Minimum
4.9004.9104.9204.9304.9404.9504.960
1 2 3 4 5 6 7 8
Observation Maximum Minimum
Minor dia
Mud Motor Rotors
© Copyright 2013 Trinity Holdings. All Rights Reserved
Hard chrome plating on Rotors
• Incoming inspection
• Stripping of existing coating
• Pre-polishing
• MPI (Magnetic particle Inspection)
• Preparation
• Chrome plating
• Buffing/ finish Polishing
• Final Inspection and QC
• Package/ handling
Hard Chrome plating on mud motor rotors
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Preparation
Involves Fixtures Taping Cleaning Chemical activation
Hard Chrome plating on mud motor rotors
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Chrome plating
Process under progress inside Chrome tank
Hard Chrome plating on mud motor rotors
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Polishing/buffing
Buffing/ Polish finish
Mud Motor Rotors
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Additional Services
Joining of two rotors to make a bigger one
Stub welding
Catcher repair
Shortening and re-threading
Mud Motor Rotors Joining of two rotors
Connecting two cut rotors
Welding the joint
Stress relieving
Finish polishing and re-coating
Mud Motor Rotors Stub Welding
Matching and finish machining
Making new stub and welding to rotor
Cutting the damaged part
Mud Motor Rotors Catcher repairs
Machining out damaged bore
Finish machining to the spec
Shrink fitting and welding sleeve onto catcher bore
Manufacturing new sleeve
Mud Motor Rotors Shortening and re-threading
Machine/ cut the un-wanted portion
Re-thread the connection
Match with chamfer at the top
Down hole Tools
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Repair & Manufacturing (partial)
Lower and Upper rotating bearing
Bearing mandrel and housings
Adjustable bent Housings
Mud Screens (manufacturing with coating)
Turbine housings
Piston Housings
Spline Mandrel
MMA Housings & Seal Retainers
Valve Piston
Rhino Bodies
Down hole Tools
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Reconditioning services include
HVOF tungsten carbide coating
Ceramic coatings
Electro less Nickel plating
Sulphamade Nickel – chrome plating
Chrome plating
Weld repairs
Heat Treatment
Bearing Mandrel MMA Housings
Turbine bearings Lower rotating bearings
Mud screens with coating Valve body repair
Adjustable bent housings Drill collar repair
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group subsidiaries